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Consider a bus designed to obtain its motive power from a large rotating flywheel (i.e. solid...

Consider a bus designed to obtain its motive power from a large rotating flywheel (i.e. solid disk) that has a mass of 1400kg and diameter of 1.5m. The flywheel is periodically “recharged” to its maximum speed of 3600 rpm by an electric motor at the bus terminal. If the bus requires an average power of 12 kW, how long will it operate between recharges? For reference, the moment of inertia of a solid disk is I =(mr^2 )/2.

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